Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (6): 100-103.

• 学术探讨 • Previous Articles     Next Articles

Research on capacity aggregating and full concurrency access method in RAID50

WENG Feng,TAN Huai-liang,LI Xiao-li   

  1. School of Computer and Communication,Hunan University,Changsha 410082,China
  • Received:2007-07-09 Revised:2007-10-19 Online:2008-02-21 Published:2008-02-21
  • Contact: WENG Feng

阵列矩阵RAID50研究——容量聚合与全并发策略

翁 锋,谭怀亮,李小利   

  1. 湖南大学 计算机与通信学院,长沙 410082
  • 通讯作者: 翁 锋

Abstract: Based on multiple RAID controllers system,this paper presents a RAID50 massive storage model.First,build hardware RAID5s of the same type on every single RAID controller,all of which have the same disk type and disk number.Secondly,regard each RAID5 as a single disk,and combine them to be a RAID50 by using software.By adopting a two level concurrency data partioning and placing method and set extended data block,which equals to a data parity group of RAID5 in a RAID controller,as the transmission granularity between Cache and RAID system,this paper carries out the full concurrency access of the m*n disks of RAID system.The two level address mapping algorithm and the best-fit algorithm of logic volume management are designed.The theoretical analysis and test results show that the method has reduced the I/O response time of the system greatly and obtained massive logic volume capacity and I/O performance which are related to the number of channels.

摘要: 提出了一种跨多阵列通道的海量存储RAID50模型,通过采取多阵列卡的RAID0分条和阵列卡上多磁盘RAID5分条和校验的二级并发的数据组织与分块方式,以扩展块(大小等于阵列卡上的一个RAID5校验组)作为Cache和阵列之间数据交换的单位,实现了将阵列矩阵中所有磁盘的容量聚合及全并发访问。设计了该模型逻辑卷管理的最佳适配算法及二级地址映射算法。理论分析与实验结果表明:该策略将I/O响应时间降到了最低,且获得了与阵列通道数线性相关的逻辑卷容量和I/O性能。